Which engine?
Manufacture date?
Miles?
This could be a heat related vacuum leak in the PVC system, or flooding, or fuel pump. If flooding you should smell gas near exhaust or in oil. This type of flooding is often caused by leaky injectors or a bad ECT sensor. Fuel delivery problems are checked with a fuel pressure guage. Both engines are prone to having the PCV hoses get soft and collapse or leak. Need to eyeball them.
